Promise theory
说───say
She kept her promise to visit them.───她遵守诺言去看望了他们。
I'll call you back, I promise.───我会给你回电话的，我保证。
Their future was full of promise.───他们的前途希望无穷。
I'm waiting for a phone, and don't know whether it will come, but I trust her for her promise.───我在等电话，不知道会不会来，但她答应我会打来，我相信她。
Tomorrow I'll come with you, he had 12 points, we would point out the candles, and I promise you to look at you wish.───明天我就过来陪你，当过了12点后，我们就点上生日蜡烛，我要看着你许下你的心愿。
So if cellulosic ethanol is to live up to its promise, researchers will have to find cheaper and more efficient enzymes.───如果纤维乙醇真能不负所望，科研人员就必须要找到更便宜有效的酶。
They made him promise, under penalty of death.
A heavy snow promise a good harvest.
I hope he will keep his promise.
I promise I will do my duty .
To promise and give nothing is comfort to a fool.